What do you have to compare it to, since it's never reported for real battles?
Ha, so why are you right and me wrong when you admit there are no sources to prove one way or the other.
It's a fair bet that at Waterloo there were many more "effective" troops left for the Brits/Prussians than the French, who were leaving the battlefield in very large numbers, with little organised resistance, unless I've read all the wrong books of course.
And exactly why do you think this number is too high?.
Everyone is allowed to "think" something for themselves (even if they turn out to be wrong) and I gave some interesting stats. If we use Borodino from them as an example, 30k and 44k
killed, wounded and missing for each side, that's about THREE times the number in the LG demo battle, so it would follow that the 30k "runaways" would also be three times as many, meaning neither side would have hardly any (if any at all ?) effective troops left after Borondino. Now you can say that is correct because after that kind of battle very few troops would be capable of fighting again for................how long ?.
What really happened ?....I'm guessing that after a period of intense action (how long ?) units were withdrawn to a quite area for rest while another fresh unit took it's place, but I doubt very much if formations that had years of training and battle experience fought for two hours and then said, "that's it, I'm done for today I'm off for a cup of tea in that nice barn over there......see you in a few days time". More likely they were withdrawn to a safe area, with little or no action, for a spell to re-group and rest, then they would be ok for further action later - if needed.
You are suggesting they fought for an hour or two and that was it, they had done their job, that may be right, but it's not the impression I have got from all the books I've read.
I could not care less if your right, or I'm right, or we are both right, or both wrong, the fact is we were not there and all we know is what we read from books and one opinion is as valid as another.
The number of "runaways" look too high to me, they look too low to you.